package com.mfangsoft.zhuangjialong.common.utils;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import com.mysql.jdbc.log.Log;

public class EmojiUtil {
	 /**
	* @Description 将字符串中的emoji表情转换成可以在utf-8字符集数据库中保存的格式（表情占4个字节，需要utf8mb4字符集）
	* @param str
	* 待转换字符串
	* @return 转换后字符串
	* @throws UnsupportedEncodingException
	* exception
	*/
	public static String resolveFromEmoji(String str)
	throws UnsupportedEncodingException {
	String patternString = "([\\x{10000}-\\x{10ffff}\ud800-\udfff])";

	Pattern pattern = Pattern.compile(patternString);
	Matcher matcher = pattern.matcher(str);
	StringBuffer sb = new StringBuffer();
	while(matcher.find()) {
	try {
	matcher.appendReplacement(
	sb,
	"[["
	+ URLEncoder.encode(matcher.group(1),
	"UTF-8") + "]]");
	} catch(UnsupportedEncodingException e) {
	throw e;
	}
	}
	matcher.appendTail(sb);
	return sb.toString();
	}

	/**
	* @Description 还原utf8数据库中保存的含转换后emoji表情的字符串
	* @param str
	* 转换后的字符串
	* @return 转换前的字符串
	* @throws UnsupportedEncodingException
	* exception
	*/
	public static String resolveToEmoji(String str)
	throws UnsupportedEncodingException {
	String patternString = "\\[\\[(.*?)\\]\\]";

	Pattern pattern = Pattern.compile(patternString);
	Matcher matcher = pattern.matcher(str);

	StringBuffer sb = new StringBuffer();
	while(matcher.find()) {
	try {
	matcher.appendReplacement(sb,
	URLDecoder.decode(matcher.group(1), "UTF-8"));
	} catch(UnsupportedEncodingException e) {
	throw e;
	}
	}
	matcher.appendTail(sb);
	return sb.toString();
	}
	
}